Metallus (NYSE: MTUS) COO exercises stock options and sells common shares under 10b5-1 plan

Rhea-AI Filing Summary

Metallus Inc.'s President & COO Kristopher R. Westbrooks reported option exercises and share sales under a pre-arranged trading plan. On February 3 and 4, 2026, he exercised nonqualified stock options for 2,951 and 2,128 common shares at an exercise price of $12.45 per share.

He then sold the same numbers of common shares on those dates at weighted average prices of $21.03 and $21.28, respectively, with individual sale prices in disclosed ranges. Following these transactions, he directly held 189,076 Metallus common shares. All transactions were executed pursuant to an Exchange Act Rule 10b5-1(c) trading plan adopted on May 12, 2025.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

X

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

WESTBROOKS KRISTOPHER R

(Last) (First) (Middle)

1835 DUEBER AVE. SW

(Street)

CANTON OH 44706

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Metallus Inc. [ MTUS ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & COO

3. Date of Earliest Transaction (Month/Day/Year)
02/03/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Shares	02/03/2026		M		2,951	A	$12.45	192,027	D
Common Shares	02/03/2026		S		2,951	D	$21.03(1)	189,076	D
Common Shares	02/04/2026		M		2,128	A	$12.45	191,204	D
Common Shares	02/04/2026		S		2,128	D	$21.28(2)	189,076	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Nonqualified Stock Option (Right to buy)	$12.45	02/03/2026		M			2,951	(3)	03/01/2029	Common Shares	2,951	$0	2,128	D
Nonqualified Stock Option (Right to buy)	$12.45	02/04/2026		M			2,128	(3)	03/01/2029	Common Shares	2,128	$0	0	D

Explanation of Responses:

1. Price reported is the weighted average sale price for shares sold by the reporting owner on February 3, 2026. Shares were sold at a variety of prices ranging from $21.00 to $21.17.

2. Price reported is the weighted average sale price for shares sold by the reporting owner on February 4, 2026. Shares were sold at a variety of prices ranging from $21.00 to $21.54.

3. Vested in four equal annual installments beginning March 1, 2020.

Remarks:

The reporting person adopted a written plan for the sale of the Company's common shares intended to satisfy the affirmative defense conditions of Exchange Act Rule 10b5-1(c) on May 12, 2025. All transactions reported herein were made pursuant to that plan.

	/s/ Kristine C. Syrvalin, as Attorney-in-Fact	02/04/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transactions did MTUS President & COO Kristopher Westbrooks report?

Kristopher R. Westbrooks reported exercising nonqualified stock options and selling Metallus Inc. common shares on February 3 and 4, 2026. He exercised options at $12.45 per share and sold the resulting shares at weighted average prices above that level under a Rule 10b5-1 plan.

How many Metallus (MTUS) shares did the COO exercise and sell?

On February 3, 2026, he exercised 2,951 options and sold 2,951 common shares. On February 4, 2026, he exercised 2,128 options and sold 2,128 common shares. Each day’s sales matched the number of shares acquired through option exercises.

What prices were involved in the MTUS insider option exercises and sales?

The nonqualified stock options had an exercise price of $12.45 per share. Shares sold on February 3, 2026 used a weighted average sale price of $21.03, and shares sold on February 4, 2026 used a weighted average sale price of $21.28, based on disclosed trading ranges.

How many Metallus (MTUS) shares does the COO own after these transactions?

After completing the reported option exercises and corresponding sales, Kristopher R. Westbrooks beneficially owned 189,076 Metallus Inc. common shares directly. This figure reflects the updated holding amount following all transactions reported for February 3 and February 4, 2026.

Were the MTUS insider sales part of a Rule 10b5-1 trading plan?

Yes. The filing states that the reporting person adopted a written plan on May 12, 2025 intended to satisfy Exchange Act Rule 10b5-1(c). All transactions reported for February 3 and February 4, 2026 were executed pursuant to that pre-established trading plan.

What details are given about the Metallus (MTUS) sale price ranges?

For February 3, 2026, the weighted average sale price of $21.03 reflects individual trades between $21.00 and $21.17. For February 4, 2026, the weighted average price of $21.28 reflects trades between $21.00 and $21.54, as disclosed in the footnotes.